Paradoxes in thermal stability of the liquid-crystal phase of phenylpropargyl phenyl ethers: I. Synthesis and mesogenic properties of phenylpropargyl phenyl ethers

SA Shchelkunov, LK Abulyaisova, SO Mataeva…

Index: Shchelkunov; Abulyaisova; Mataeva; Sivolobova; Muldakhmetov Russian Journal of General Chemistry, 2001 , vol. 71, # 7 p. 1130 - 1132

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Citation Number: 2

Abstract

Abstract The ethers PhC≡ CCH 2 OC 6 H 3 RR'were prepared in 51-83% yields by reactions of phenylpropargyl tosylate in alkaline solution with appropriate p-and o- substituted phenols. Below are given R, R', and the ranges of existence of the nematic mesophase (° C): pI, H, 104-137; p-Cl, H, 65-117; pF, H, 33-53; p-OMe, H, 79-120; H, H, 44- 115; p-(Me) 3 C, H, 74-82; p-COOH, H; p-NO 2, H, 77-96; o-NO 2, H, 83-139; o-CHO, H, 75 ...